It appears not to be confined to older BMW's my 01 530i has had both panels replaced. The larger one, closing engine compartment panel 51-71-8-174-737 and the smaller closing panel 51-71-8-174-737, hidden behind the micro air filter housing. The centre panel was in numerous pieces and when touched crumbled to dust the other panel was slightly better off. These I purchased from Pelican Parts at $28.20 and $27.45 on the 25th July.They took about six days to reach me here in New Zealand.